Samuel w



(No Model.)

S. W. DOUGLASS.

POINT FOR DEEP WELLS.

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Mrs STATES PATENT OFFICE.

SAMUEL XV. DOUGLASS, OF NE YORK, N. Y.

POINT FOR DEEP WELLS.

SPECIFECATION forming part of Letters Patent. No. 340,035 dated April13, 1886.

(No model.)

T0 at] whom it may concern.-

Be it known that I, SAMUEL W. DOUGLASS, of New York city. New York, haveinvented a new and useful Improvement in Points for Deep \Vells, ofwhich the following is such full, clear, and exact description as willenable others skilled in the artto make and use the same, when taken inconnection with the accompanying drawings, in which- Figure 1 is aperspective view. Fig. 2 is a vertical section. Fig. 3 is a horizontalcrossseetion at 9000. Fig. at is a horizontal cross section at y y.

Like letters indicate like parts in all the drawings.

This invention relates to apparatus and method of sinking deep wells ingravel, sand, or quicksand by means of a pipe or tube through which acontinuous supply or flow of fluid is maintained; and it consists of thecontracting end or point attached in the tube, so that it is adjustableand removable by a rod passing through the pipe or tube to which it isattached, and the various combinations hereinafter specified andclaimed.

My invention herein set forth and claimed is intended to be used withand to be an improvement on the devices described in Letters Patent No.288,557, to J. P. Edson, November 13, 1883, and Letters Patent No.299,546.

The present invention is more applicable to boring wells or deep shaftsby means of tubes or pipes sunk in sand or quicksand by means of a flowof water or other fluid down the pipe being sunk in a continuous mannerto a rock or other hard obstruction, and boring through the rock orobstruction by a drill passed through the pipe or tube.

To the lower end of the tube G is secured a shoe, A, preferably of thesame outward diameter as the tube. The internal bore of the shoe isslightly less than the bore of the tube. The tube and shoe are joined toone another by means of proper screw-threads on the shoe to fit thethreads E in the end of the tube. On the interior of the shoe A is aleft-hand thread, 0, which thread extends the entire length of thesmaller bore of the shoe. A head, B, pointed at one end, and havingholes F F through it, and the chamber or socket at the other end, inwhich is the thread D, to receive the drill-rod H, is provided on itsexterior greatest circumference with a thread to fit in the interiorthread of the shoe A. This thread extends throughout the entire lengthof the greatest circumference of the head B. The drill-rod H has at itslower end a right-hand screw-thread, D, which fits in the thread in therecess or chamber in the head B. The threads between the shoe A and tubeG are left-hand, and between the drill-rod H and head B are right-hand.The thread between the shoe Aand head B isleft-hand, so that when thedrill-rod is turned into the head so that the shoulder on H abuts theshoulder on the head B a continuance of turning in the same directionwill screw the head B up through the shoe A, and free it from the shoe.

The shoe may be secured to the tube or'casing by a screwthread, eitherright or left hand, if provided with a key to prevent the shoe turningwith the turning of the head B in it, or the shoe may be keyed or brazedon the tube, without departing from the nature of my invention.

The mode of operation is as follows: The shoe A and head B are securedto one another at the screw (J, and the shoe A to the tube or casing atthe screw E. A flow of water is maintained through the case or tubedownward and out at the openings F F in the head B, which makes apassage through the soil or gravel into which the lower end or head B isplaced, so that the tube sinks into it, and continues to sink until rockis reached, when the drill-rod H is put in the case or tube G, and wateris supplied at the upper end of the drill-rod, and the drill-rod isscrewed into the head until the shoulder-on it comes against theshoulder on the head, and turns it so as to screw it up from the end ofthe shoe out of the thread 0. A continuous flow of water is thusmaintained through the openings F F. The head may now be raised with thedrillrod through the casing, when a drill-rod with a boring-head shouldbe inserted in the casing, and the rock at the bottom bored thereby. Awater-flow should be maintained through the tube G and shoe A when therod H is withdrawn, to prevent a return of the washed-out sand or gravelduring the change of drills.

What I claim as new, and desire to secure by Letters Patent, is-

l. The combination, with a well casing 0r i tube, of a shoe, A, havingan internalscrewthread of slightly less diameter than the internaldiameter of the well casing or tube,substantially as described.

2. The combination, with a well casing or tube, of a shoe having aninternal screw-thread of slightly less diameter than the internaldiameter of the well-casing or tube, and anozzlepoint having an externalscrew-thread fitting in the internal screw-thread of the shoe,substantially as specified and set forth.

3. The combination, in a nozzle-point, of an external screw thread, 0,and an internal screw-thread, D, in the chamber, one thread being in theopposite direction from the other, I 5 substantially as specified.

4. The combination, with a well casing or tube, of a shoe having aninternal screwthread, a nozzle point having an external thread tocorrespond therewith, and an inter- 2o nal thread in the chamber in areverse direction from the external thread, and a. drill-rod having anexternal thread corresponding with the internal thread of thenozzle-point; I S. W. DOUGLASS. \Vitnesses:

JOSEPH J. SULLIVAN, E. G. THoMPsoN.

